Patent GB-193080-A (GB)
Title: Improvements in machines for blowing glass
IPC: C03B9/18
Filed: 1921-09-12
Abstract: 193,080. Imray, O. Y., (Obear-Nester Glass Co.). Sept. 12, 1921. Blowing. - Relates to machines for blowing glass bottles of the kind comprising two rotatable tables carrying the blank and finishing moulds respectively and provided with inverting and transferring mechanism between the moulds and with a purity-operated element actuated by the lowering of a gather into a blank mould to control pneumatic means for severing and packing the gather, opening the mould, operating the transferring and inverting mechanism to convey the blank to the finishing mould, and blowing the blank within the finishing mould. According to the invention, the shearing mechanism is combined with a blow head for packing the gather, the transfer mechanism is adapted to grip the necks of the inverted bottles in the blank moulds and to deposit them in an upright position in the finishing moulds, and the blank moulds are covered bv a vertically movable but non-rotary top disc carried by the piston rod of a pneumatic cylinder upon which the mould table rotates, the disc being cut away at one sector to enable the bottles to be removed from the blank moulds. General operation. - Figs. 1, 2 and 3 illustrate a five - station machine, the operations at the various stations being as follows, viz. for the blank table, at station 1, charging, shearing, packing, and removal of neck pin; station 2, initial blowing; station 3, transfer to finishing mould; stations 4 and 5, idle : for the finishing table, at station 1, blank received and mould closed; station 2, idle, allowing glass to cool; station 3, bottle blown; station 4, idle; station 5, finished bottle removed. Shearing and packing.-A combined shearing- plate and blow head 38, Figs. 14 and 15, is mounted upon a stud 35 on the top disc 24 which is provided with an opening 28 at the first position for the introduction of the gather. As the gather is introduced, the punty depresses a lever 64, opening a valve 59, Fig. 1, which admits compressed air from pipes 182, 154, Fig. 21, pipe 72, Fig. 2, and pipe 57, Fig. 3, to a pipe 58 and cylinder 46 to rotate the shearing-plate 38 and sever the gather. As the movement of the shearing-plate finishes, compressed air is admitted through pipes 66, 67, 69, Fig. 3, to a port 36, Fig. 14, in the stud 35 and passes through a passage. 43 and clusters of air vents 45 in the shearing- plate to the mould, thus effecting the packing of the gather about the neck pin at the bottom of the mould. Locking and controlling gear.-A portion of the compressed air passes from the pipe 67, Fig. 3, to the pipes 68, 189, Figs. 2 and 21, thus depressing the piston 172 throwing the pipe 154 open to exhaust and admitting compressed air from the pipe 182 to the pipe 170. While the piston 172 is in its upper position, pistons 12, 14, Fig. 1, are held in their lower positions by compressed air admitted above them, thus depressing the blow head 123 and top plate 24 respectively into contact with the moulds beneath. As soon as the piston 172 rises, the spaces above the pistons 12, 14 are thrown open to exhaust and air is admitted from the pipe 170 beneath these pistons, which rise to their upper positions freeing the moulds from engagement with the blow head 123 and top plate 24. The upward movement of the piston 172 is effected by compressed air admitted from the pipes 188, 187, 186, Fig. 1, after the rotation of the tables 17, 21 is completed. The upper end of the piston 175, Fig. 21, engages with holes 174 in the rotary table 21 when in the upper position so as to lock it and prevent rotation. Removal of neck pin. - At the moment when the piston 14 rises, compressed air is admitted from the space below the piston to the space above a piston 100, Fig. 19, withdrawing the neck pin as shown. Operation of rotary mould tables.-The pipes 154, 170 are connected to the upper and lower ends of two vertical cylinders 158, Fig. 1, adapted to raise and lower gear wheels 163 slidably mounted on shafts 161 carrying pinions 162 in engagement with ring gears 19, 23 secured to the rotary mould tables. When in their upper positions, the gears 163 engage with a rack 165, Figs. 1 and 2, operated by a piston rod 166. When compressed air is admitted to the pipe 170, the gears 163 first engage with the rack and the piston rod 166 is then forced outwards, thus rotating the mould tables through 73‹ to bring the moulds to the next stations. When the piston 172, Fig. 21, rises, the gears 163 drop out of engagement with the rack and the piston rod 166 moves inwards ready for the next operative stroke. Initial blowing of the blank is effected at station 2 by the admission of compressed air through a port 111, Fig. 20, from the space above the piston 14. The extent of blowing is regulated by a throttle valve 113<1>. Opening of moulds.-The mould plates 73, Fig. 1, carry projections 74 upon which are mounted bell crank levers 75 connected by links 78 to the half sections of the moulds. Cylinders are formed in the mould plates 21 beneath each bell crank lever containing pistons 85, Fig. 16, which are raised just before a mould reaches the third station by the engagement of the ports 89, 90, as shown. Transfer of parison.-Simultaneously with the opening of the mould at the third station, air is admitted from the port 90, Fig. 16, through a pipe 155, Fig. 2, to a port 142 and cylinder 134 driving a piston 146 outwards so that grippers 148 carried bv the piston rod engage the neck of the bottle in the open mould. The cylinder 134 is mounted on a stud 133 rotatably mounted in a bearing 132 which can be raised and lowered by a piston 130, Figs. 1 and 4, working in a cylinder 129. A crank arm 135 is carried by the stud 133, the crank pin 136 being adjustably coupled to a rod 139 pivoted at 141 to the cylinder 129. Immediately after the grippers 148 have engaged a bottle, compressed air from the port 142, passing through passages 143, 131<a>, Fig. 4<a>, to the space below the piston 130, forces the latter upwards and operates the transfer device as indicated in dotted lines in Fig. 1 to deposit the bottle in an upright position in an open finishing mould. As the movement is completed, the port 145', Fig. 2, comes into engagement with the port 142 and the gripper is retracted from the bottle. The transfer mechanism is returned to its original position by compressed air passing from the lower side of the piston 12 through a pipe 151, Fig. 7, and pipe 149, Fig. 4a, to the space above the piston 130. Finishing moulds.-The mechanisms for opening and closing the finishing moulds and for raising and lowering the blow head 123 are of similar construction to those employed for operating the blank moulds. Specification 193,365 is referred to.